We recently had a freon leak fixed and now we can hear the refrigerant going through the line in route to the air handler. It sounds like we have an open faucet and you can hear the wtaer running through the pipe. Any idea what causes this. I called the repair company was was told just to keep an eye on it and if it get worse, give them a call. We have had the unit for 9 years and never heard this sound before. Any help would be paareciated. Thank you.

Heating & Cooling - Fedders